Furnace



A ril,6- 1926. 1,580,028

w. s. FANDREI FURNACE 1 1% Dec. 22, 1924 2 Sheets-Sheet 1 mszianawg ATTORNEY.

A ril 6,1926. 1,580,028

. w. s. FANDREI FURNACE Filed Dec. 22 193 2 Sheets-Sheet. 2

Patented Apr. 6, 1 926,

I V TED TATES f OFFICE-5.

wrLLIAM s. nannnnr, OEASHTIABULA', onto.

' fermion.

Application me December 22,1924. seiii n' 757,446.

To all whom it may concern: 7

Be it known that I, WVIL'L AM SFANnnnr,

particularly to furnaces associated with 10' steam generators,andhas for one of itsobects to provide a simply constructed device adapted to be located between the combustionchamber and smoke flue and operative to deflect and retard the products of combustion and produce an increased length; of travel andlonger path for the flames: and ignitible'gases, to in'creasethe economy in the consumption of the'fuel.

Another object of thisfinvention'is tof f vide a device of this character wherebythe flames, as they pass beneath the attachment are caused to take a downward'and spread ing course thereby materially increasing the distribution chamber, and correspondingly increasing their efliciency'and heat radiating properties, and whereby alarger percentage of the heat units are utilized,-'andprevented from passing out through the smoke flue.

Another object of the invention is to provide a device of this charaoter'including'a I rear wall of fire resisting units having a semi-conical upwardly and forwardly'directed extension of fire resisting units and merging at the smaller end into the wall and spaced at its sides from the sidesof the smoke area of a furnace. I I

With these and other objects in view the invention consists in certain novelifeatures of construction as hereinafter shown and described and then specifically'pointed out in the claim, and inthe drawings, illustrative of the preferred embodlment of the 1nvention- 7 Figure l is a longitudinal section of aportion of a conventional furnace and smoke flue, with the improved attachment arranged therein, the upper half of the attachmentbeing in plan view and the lower half in longitudinal section, I I

Figure 2 is a section on the line 22 of Figure 1. r I

. Figure 3 is a transverse section on the line 3-3 of Figure 2, looking in the direction of I I I 'wall 19. :without abrupt changes of direction of theinner faces, no ledges or projections 19 the arrow.

Figure a is avertical section 9n the line 4 4 of Figure 2, looking inthe direction of the-arrow. 1 The improved device may be adapted without material structural change'to furnaces of various constructions, but for the 0 purposeof, illustrationis shown installed in I a conventional furnace between the combus tion chamber and smoke flue, the furnace wall being indicated at 10, the smoke flue at I l1',' a portion of the grate at 12 definingthe 135 combustion chamber at 13 and the ash pit at 14;.with'the bridge wallat 1*5' Restingupon the gra'tebars the main bridge wall 15' is an auxiliary' or supplemental, bridge wall represented as a 7 whole at 16 and" formed with a plurality ofspaced transverse passages 17 and ,alongitudinally directed "recess 18 with which the passages individually communicate at the upper side of tlie'recess, as shown. f

The rear sin of the recess 18' is'clos ed by the niainbri'dge wall 15, and communicates at its llowerside with the ash pit"14,through spaces'between the "rear: or inner ends ofthe gratebars.w ,1 'f f By this meansaplurality of" passages. are provided between the ash pit'andthe com-v bustion chamber, and supplying currents of air to the flames as they pass over the bridge of the combustion. I I

Erected inthe rear portion of the smoke arch, or at the lower portion of the smoke wall, and materially increase the efliciency flue, is a supporting wall 19, and located at the juncture of the furnace shell 10 and the base of the smoke flue 11, is another supporting wall 20, the latter having a relatively large opening forthe passage of'the products of the combustion, as indicated in Fig ures 1 and 3, and springing from the supporting walls 19 and 20 is a deflector portion semi-conical in form and represented as a whole at 21. The members 19, 20 and 21 are constructed of a plurality of fire proof unitsor bricks, as shown, and the portion 21 by its'arching and semi-conical form is self supporting on the supporting I walls, the center or key of the arched p0r-' tion being further supported, by a post device 22, also of fire proof units.

The wall 19 and the semi-conlcal deflector portion '21 being formed of fire resisting units, and the portion 21 merging into the I 12 and against beneath the lower edges of the deflector and upwardly between the deflector and the side walls of the smoke flue, as indicated by the arrows.

The products of the combustion are thus retarded and caused to take a longer path in passing from the grate to the outlet flue,

or other Words the flames by contacting with the arched and semi-oonical deflector, are turned downwardly thereby and caused to traverse a materially increased distance, whereby the ignitible gases are more thor: oughly consumed and the smoke and other combustible particles also more thoroughly consumed by the coaction of theair passing through the supplemental bridge Wall. The inverted arch portion also imparts a spreading action to the flames thereby causing a more equal distribution of the combustible gases, so that a much larger percentage of the heat units are utilized and prevented from passing out With the smoke,

The). more complete combustion of the and m olid par i le of he p ds et'the ombus on, mat ially decreas s he deposit of o t n he ike, ill be obvious.

y t e action f e defle torc eane ub and heating surfaces results, and the correpend ng in rease eifi i ncy andw t less deposi s n t e sh P t The improved device is simple in construction and can be readily adapted to furnaces and generators of various sizes and constructier;-

The preferred embodiment of the invention is disclosed in the drawings and set forth in the specification but it Will be understood that modifications Within the scope of the elaimed invention may be made in the construction Without departing from the principle of the invention or sacrificing any of its advantages. I Having thus described the invention What is claimed is:

Ina furnace including grate bars having a solid bridge Wall extending across the rear ends thereof, a supplemental solid bridge wall resting upon said bars and extending transversely thereof against the face of said first mentioned bridge Wall, said supplemental bridge wall having a recess in, and extending throughout the length of the back, said recess being of less height than the Wall and opening through the grate therebeneath, and said supplemental Wall further having a erie of ransve s Pa ag h e h o opening at one end through the front ofthe all and at the other end into the upper part of said recess,

I testimony whe eo 1 Mix my Signature he et lVILLIAM FANDREI. 

